1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185c476e8aa462fb00cef04e4f063ef9e7efb16e4b3e24fc1d58731e5fbf51bf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2aa150b-f965-464a-b42c-766cf379023a.json and https://artists.proofprofile.net/proofs/artist/c2aa150b-f965-464a-b42c-766cf379023a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597a35a2c71bdebd35080f43052234aa952daa3b6f98a3e542ed4becd5070e2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c9ad5705b2c5d6f3b31e838d3e60869c35087a19346a58ccf1724a351c0bc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f06c65cb7e85dec529fbb035162d501605b30c23c2b4b0ce5bde84917085a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861f71a90a783b50713a69de565d8ddad6d974924cf8a8847f74f2c01bee6dd0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aef4b2e17fd80ae1ee25c542954f3b5441d3c48627ab120ac7c5bf9af002a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bba6dad4c3dc7954406f26e414160a61d024bd79522e13ea99e7424edeb521a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ec38422939b3e588fbc9ef7c50fdf93489e2ad5a98bbeffe0b02c8a3371b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe773cfd042ddb0fbcb7e538531bb07e80bd72c7bebd2ac833c034b9aa61d0c9a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUB832300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a22621403bc2a0df5c5e22c3dde951bc9b617305cfbb90733250196837bbe. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0S2457620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd031998d288357c588468c6574c2cd84b78054ce5e43480ac7a74bb28918b5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2508492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a22621403bc2a0df5c5e22c3dde951bc9b617305cfbb90733250196837bbe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0S2457620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256b39cdd49bdd6be5439bc3310bdc79477ee3a9ec84a97774c1b6334fc46502. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX872580333.